383 to replace 350

[howhoecanyougo]

Anyone accomplished building a 383 to replace your original 350? I bought a complete L31 Vortec 350 (just like in your tahoe or yukon) I have loads of questions as far as timing and computer issues. The block is on its way to the machine shop...ready to make a decision "383 or 355"

 

[FunFordCobra]

I'm using a 355 now with no problems at all but everything is all stock. I plan on a 383 as well and I'm sure as long as you aren't making a 450hp+ monster everything should be fine. I dropped in a mild 383 in my old 97 z28 and didnt have any ecm problems. Once you start replacing MAF and fuel system components is where you will start having problems.

 

[blueflamed03]

so do you plan to go ahead and do the stroker rotating assembly?

 

[Phone Man]

I just installed the HT383E crate engine from GM. It was a better investment for me to just go with a crate rather than a rebuild. I would recommend the 383 stroker cause if your going to take the time and expense to do it, just go bigger. It is a lot of work to get that engine in and out. You don't want to say "shoulda, woulda, coulda". A 383 is actually a 6.2 liter motor! Go for it!

 

[TigerEyz3]

Depends who/where you ask on the displacement... I've seen the 383 listed as 6.3L.

I agree that if you're gonna yank it and mod it, might as well go all out. 383 is the way I'd go, whether stroking it or crating it.

 

[99Yuk]

I just installed the HT383E crate engine from GM. It was a better investment for me to just go with a crate rather than a rebuild. I would recommend the 383 stroker cause if your going to take the time and expense to do it, just go bigger. It is a lot of work to get that engine in and out. You don't want to say "shoulda, woulda, coulda". A 383 is actually a 6.2 liter motor! Go for it!

Damn it! "Shoulda, Woulda, Coulda"... HAHAHA...
Yup, I'm saying those words all the time, when I see threads like this....sigh...

After signing up for this forum, two months after new 5.7l GM Crate install, I went back to shop.. It was only $1000 difference for the 383.. Damn it! Ignorance is not bliss, it's a kick myself in the ass!

I say, spend the extra and buy what you want already in crate form...

 

[howhoecanyougo]

The old Vortec is running strong and doesnt burn a drop, It will be a while, I figured everyone would say go 383...I have built several blocks, never considered Crate, but it may be the way to go, its pricey either way. Just dont want ECM trouble, I figured the ECM would freak out with the timing and compression changes. But if it worked in a 97 Z28, it should work in the Hoe. Guess I can just build a 355 with this 880 block if I opt to go HT383E and sell the 880 on CL. And if I built the 383, I would totally rock the Stroker Balanced Rotating Assembly. Build it right the first time.

 

[Chevyrider619]

Can anyone tell me where to look for reasonable prices for crate 350 or 383?? Just doing some homework when taxes come i have my due list hehehhe.. U guys see my 35's?? I wanna make those baby's smoke like a train LOL

 

[blueflamed03]

http://sdparts.com/

http://sdparts.com/category/gm-performance-parts-350ci-330hp-350ho-engine

http://sdparts.com/category/gm-performance-parts-383ci-340hp-ht383-engines

 

[Chevyrider619]

Appreciate it blueflame03.. Next year, i'll put that video up hehhehehe. I'm gonna smoke them rice rockets uuuuu-weeeeee!